40 documents found, page 1 of 4
Optimization of Heterogeneous Photosensitized Oxidation for Winery Effluent Tre...
Silva, Mariana; Oliveira-Inocêncio, Inês; Martins, Rui C.; Quinta-Ferreira, Rosa M.; Gmurek, Marta; Nogueira, Anabela Gonçalves; Castro-Silva, SérgioIn this study, the heterogeneous photosensitized oxidation treatment of winery effluents was optimized using chitosan carriers immobilized with Zn(II) Phthalocyanine tetrasulfonic acid. The influence of main operating parameters such as initial pH, aeration flow rate, photocatalyst load, and concentration of the photosensitizer used in the photocatalysts’ preparation was investigated. Results for chemical oxyge...
Homogeneous Photosensitized Oxidation for Water Reuse in Cellars: A Study of Di...
Santos, Andreia D.; Gonçalves, Diana; Martins, Rui C.; Gmurek, Marta; Nogueira, Anabela Gonçalves; Castro-Silva, Sérgio; Castro, Luís M. M. N.The demand for fresh water is increasing daily, requiring industries to take action to reduce the need for fresh water. Winemaking industries represent a massive hydric impact by combining the water consumed and the high volume of wastewater produced. The sun-driven photooxidation process has been widely employed in removing wastewater pollutants. This work employed four photosensitizers, Rose Bengal, AlPcS4, Z...
A model of zinc dynamics evoked by intense stimulation at the cleft of hippocam...
Sousa, Marta S.; Alves, João L.; Freitas, Johnattan C.S.; Miraldo, João N.; Aidos, Fernando D.S. Sampaio dos; Santos, Rosa M.; Rosário, Luís M.Zinc is a transition metal that is particularly abundant in the mossy fibers of the hippocampal CA3 area. Despite the large number of studies about the zinc role in mossy fibers, the action of zinc in synaptic mechanisms is only partly known. The use of computational models can be a useful tool for this study. In a previous work, a model was developed to evaluate zinc dynamics at the mossy fiber synaptic cleft,...
A biochemical methane potential of pig slurry
Santos, Andreia D.; Silva, João R.; Castro, Luís M.; Quinta-Ferreira, Rosa M.This study assesses the methane production potential for the Anaerobic Digestion of Pig Slurry, using two different Substrate to Inoculum Ratios, 0.65, and 1, and its comparison with the theoretical prediction. The Specific Biogas Production, the Specific Methane Production, and the average methane content were determined for both experiments and adjusted to Standard Temperature (273.15 K) and Pressure (1 atm)....
Kinetic prediction of biochemical methane potential of pig slurry
Santos, Andreia D.; Silva, João R.; Castro, Luís Miguel Moura Neves de; Quinta-Ferreira, Rosa M.Empirical Kinetic Models have been used to describe and establish the Anaerobic Digestion kinetics of pig slurry’s (8% TS) Biochemical Chemical Potential. A wide selection of Empirical Kinetic Models were fitted to the experimental data collected in batch assays of different Substrate to Inoculum ratios, 0.65 (BMP1) and 1 (BMP2). For the selection of the most suitable model for each BMP assay, the statistical t...
Advanced oxidation processes for recalcitrant compounds removal comparison with...
Gomes, João; Domingues, Eva; Gmurek, Marta; Quinta-Ferreira, Rosa M.; Martins, Rui C.Conventional treatments cannot remove the emerging contaminants due to their refractory character, therefore improved methodologies should be applied for obtaining their total removal. The need of development of suitable technologies to treat these recalcitrant compounds is related with the wastewater reclamation. Advanced oxidation technologies such as photocatalysis and ozonation appear as suitable solutions ...
N–TiO2 Photocatalysts: A Review of Their Characteristics and Capacity for Emerg...
Gomes, João; Lincho, João; Domingues, Eva; Quinta-Ferreira, Rosa M.; Martins, Rui C.Titanium dioxide is the most used photocatalyst in wastewater treatment; its semiconductor capacity allows the indirect production of reactive oxidative species. The main drawback of the application of TiO2 is related to its high band-gap energy. The nonmetal that is most often used as the doping element is nitrogen, which is due to its capacity to reduce the band-gap energy at low preparation costs. There are ...
Removal of Enteric Pathogens from Real Wastewater Using Single and Catalytic Oz...
Gomes, João; Frasson, Danilo; Quinta-Ferreira, Rosa M.; Matos, Ana M.; Martins, Rui C.Water scarcity is one of the main problems of this century. Water reclamation appears as an alternative due to the reuse of treated wastewater. Therefore, effluents treatment technologies (activated sludge, rotary biological discs, percolating beds) must be improved since they are not able to remove emerging contaminants such as enteric pathogens (bacteria and virus). These pollutants are difficult to remove fr...
Catalytic Efficiency of Red Mud for the Degradation of Olive Mill Wastewater th...
Domingues, Eva; Assunção, Nelson; Gomes, João; Lopes, Daniela V.; Frade, Jorge R.; Quina, Margarida J.; Quinta-Ferreira, Rosa M.; Martins, Rui C.Olive mill wastewater is a challenging e uent, especially due to its toxicity related to the presence of phenolic compounds. Fenton’s process was analysed on the abatement of phenolic acids typically found in this kind of e uents. To overcome the main drawback of Fenton’s process, a waste from the aluminium industry commonly called red mud was used as a heterogeneous source of iron. The adsorption of simulated ...
Effect of Different Radiation Sources and Noble Metal Doped onto TiO2 for Conta...
Martins, Rui C.; Domingues, Eva; Bosio, Morgana; Quina, Margarida J.; Gmurek, Marta; Quinta-Ferreira, Rosa M.; Gomes, JoãoWater scarcity is a worldwide problem boosted by global warming and pollution of anthropogenic origin. The contaminants of emerging concern in water sources are increasing due to the ine ciency of conventional wastewater treatments, and these should be mitigated. Advanced oxidation processes appear as suitable solutions for decontamination. The photocatalytic oxidation of the mixture of sulfamethoxazole, carbam...